{
  "name": "convert_currency",
  "description": "Convert between currencies with optional historical rates and fee calculation",
  "parameters": {
    "type": "object",
    "properties": {
      "amount": {
        "type": "number",
        "description": "Amount to convert",
        "minimum": 0
      },
      "from_currency": {
        "type": "string",
        "description": "Source currency code (USD, EUR, GBP, etc.)",
        "pattern": "^[A-Z]{3}$"
      },
      "to_currency": {
        "type": "string", 
        "description": "Target currency code (USD, EUR, GBP, etc.)",
        "pattern": "^[A-Z]{3}$"
      },
      "date": {
        "type": "string",
        "description": "Date for historical rates (YYYY-MM-DD), defaults to current",
        "format": "date"
      },
      "include_fees": {
        "type": "boolean",
        "description": "Include conversion fees in calculation",
        "default": false
      },
      "precision": {
        "type": "integer",
        "description": "Decimal places for result",
        "minimum": 0,
        "maximum": 8,
        "default": 2
      }
    },
    "required": ["amount", "from_currency", "to_currency"]
  },
  "test_questions": [
    "Convert $500 USD to Euros",
    "How much is 1000 Japanese Yen in British Pounds with fees included?",
    "Convert 250 EUR to CAD using rates from 2023-12-01"
  ]
}